EP 0098895 A1 19840125 - Rigid diaphragm transducer with plural coils.
Title (en)
Rigid diaphragm transducer with plural coils.
Title (de)
Wandler mit starrer Membran und mehreren Spulen.
Title (fr)
Transducteur à diaphragme rigide avec plusieurs bobines.
Publication
Application
Priority
US 18694280 A 19800915
Abstract (en)
A rigid surface transducer of the electro-acoustic type more commonly referred to as an audio speaker. The transducer comprises an improved diaphragm and driver configuration and improved excitation modes. The improved features are accomplished by the combination of: a driver (21) comprising at least two pairs of magnets (23), the magnets of each pair being spaced apart in one direction a first distance to form a first pair of gaps, (45) each pair of gaps being spaced apart in another direction to form a second gap (25); a diaphragm (5) and coil support assembly (1) including: a coil support (3) comprising a pair of elongated members (3) spaced apart a distance greater than the second gap (25); a spirally wound coil (7) on an outside face (17) of each of the elongated members (3), the end of the coils adapted to be coupled to an electrical signal generating means; a nonflexible nonplanar diaphragm member (5) mounted between inside faces of the elongated members (3); one of the elongated members being located in each of the pair of first gaps (45); and, the diaphragm being located in the second gap (25).
IPC 1-7
IPC 8 full level
H04R 7/04 (2006.01); H04R 7/14 (2006.01); H04R 9/04 (2006.01)
CPC (source: EP US)
H04R 7/045 (2013.01 - EP US); H04R 7/14 (2013.01 - EP US); H04R 9/04 (2013.01 - EP US)
Citation (search report)
- [A] GB 1045807 A 19661019 - WOLFGANG FELIX EWALD
- [A] US 3873784 A 19750325 - DOSCHEK ANTONY Z
- [AD] US 1934184 A 19331107 - ERWIN GERLACH, et al
- [A] IBM TECHNICAL DISCLOSURE BULLETIN, vol. 19, no. 10, March 1977, page 3857, New York (USA);
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 82106425 A 19820716; US 18694280 A 19800915